
BARISAN DAN DERET ARITMATIKA
Presentation
•
Mathematics
•
11th Grade
•
Practice Problem
•
Hard
Juliyanti Juliyanti
Used 9+ times
FREE Resource
10 Slides • 0 Questions
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ARITMATIKA
Ilmu hitung dasar dalam matematika mencakup penjumlahan,
pengurangan, pembagian dan perkalian
a = suku pertama
n = banyak suku
b = beda
b = Un - Un-1
Rumus suku ke-n (Un)
Un = a + (n-1)b
Rumus Jumlah n suku pertama (Sn)
Sn = n/2 (2a + (n-1)b)
Jika diketahui Un
Sn = n/2 (a + Un)
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K
ui
s
Ada sebuah papan yang dipotong
menjadi lima bagian dan ternyata
membentuk barisan aritmatika.
Papan paling pendek berukuran 1,2
meter dan yang paling panjang 2,4
meter. Lalu, berapakah panjang
papan tersebut sebelum dipotong?
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